Radiodial



sept. 7,1926.

E. F. wEsToN RADIODIAL 'Filed DeC. 16. 1925 2 Sheets-Sheet 1 1,599,034 E. F. WESTON RADIODIAL Filed Deo. 16, 1925 2 Sheets-Sheet 2 Patented set-t. 7,1926.

, UNITED STATES PATENT oFFICE.

EDWARD F. WESTON, OF NEWARK, NEW ERSEY, ASSIGNOR TO WESTON ELECTRICAL INSTRUMENT CORPORATION, OF WAVERLY PARK, NEWARK, NEW JERSEY, A COR- rom'rIoN or NEW JERSEY.

RADIODIAL.

Application mea December 1e, 1925. serial No. 75,807.

This invention relates to a dial, `and particularly to a dial for use on a shaft having a plurality of angularly spaced operating positions. While not limited thereto, the invention will be described as embodied in a dial for use on radio equipment.

Tap switches for inductances actances and switches for voltmeter circuits are usually furnished with a dial or pointer having a numerical scale, which scale requires the use of a chart for ascertaining the particular circuit established when the shaft occupies a given position. In view of the great variety of circuits in which a tap switch or voltmeter switch might be incorporated, it has been considered impractical the use of a reference chart unnecessary.

An object of this invention is to provide a f dial vhavin@` a legend-bearing sheet or plate upon which maybe placed legends appropriate 'for the particular use to which the dial is put. A further object is to provide a dial which conforms in a` general way to the usual radio dials and which has a removable legend-bearing sheet. More. specifically, an object of the invention is to provide a dial having a plurality of circumferentially arranged sight openings behind which the legend-bearing portions of a removable sheet are fixed. l

f These and other objects of the invention will be apparent from the following speciication when taken with the accompanying drawings in which,

Fig. 1 is a fragmentary central section illustrating one embodiment of my invention and the shaft and panel with which the same is associated;

Fig. 2 is a front elevation of the dial and a portion of the panel; 0

Fig.,3 is a plan view of a typical indicating sheet; Y

Fig. 4 is a plan view of a spring washer which holds the indicating sheet in place;

Figs. 5 and 6 are a central section and a rear elevation, respectively, of a modification;

Fig. 7 isa perspective view of the bushin shown in Figs. 5 and 6; and

Fig. 8 is a central section of a further modification of the invention.

In` the drawings, the reference character P indicates the panel in front of which the or other redial D is mounted upon the shaft S, which shaft forms a portion of a radio instrument I. As illustrated in Fig. 1, the instrument comprises a voltmeter switch, but the particular instrument with which the dial is to be associated'is not an essential element of the invention.

As shown in Fig. 1, the dial D comprises a bushing 1 and set screw 2 for attaching the dial to the shaft S. The bushing is embedded in a moldedfknob 3l and is threaded atits inner end v to receive the clamping nut 5v which holds the dial member 6 against the inner face of the knob 3. v

As shown in Fig. 2, the dial member 6 lis provided with a plurality of circumferenformed as apertures extending through the dial member. If desired, the dial'member 6 may be formed of opaque material having transparent portions providing the several sight openings. The indicating sheet or legend-bearing chart 8 may be a sheet of paper, celluloid or the like, which vis held against the rear face of the dial member 6 by a spring washer 9 and the flanged shoulder of the nut 5. The 'indieating sheet 8 is preferably marked off in zones by radial lines 10 and is notched as at 11 for cooperation with thelug 12 which is formed on the rear of the dial.. sectors of the indicating sheet-Scarry legends which, in the particular sheet illustrated, indicate the particular circuits across which the volt-meter is connected #when the shaft S of the switch I is adjusted by the dial D. The panel P is provided with a iducial mark F and the dial is ad` .justed on the shaft S to establish the partic- .The various w sheets 8 which carry legends appropriate for use in various standard types of sets. 1f the user does not find a sheet carrying the particular legends Which are suitable for the use to Which the dial is to be put, he may prepare a sheet for his special use by marking the appropriate legends upon the rear face of one of the stock sheets. In some instances the sheet furnished will carrythe articular legends which the user Wishes, but these legends vvvillnot appear in the order which he desires. In this case the lindicating sheet may be cut along the radial lines 10l and reassembled with the several sectors in their proper relationship.

As illustrated in Figs. 5-8, inclusive, the knob and dial may be combined. n Fig.l 5,-the knob and dial member 14' is molded upon the bushing 15, which bushing is provided with the usual set screw 16. rlhe v dial 14 is provided with a plurality of sight openings 17 as in the other embodunent of the invention. The inner end of the bushing 15 is provided with sections 18, 19, of non-circular cross-section, which sections are spaced apart bythe section 20 of circular cross-section. The indicatingsheet 21 has a central aperture of thesame shape as the bushing section 18, and the sheet is held against the rear face of the dial member by a spring Washer 22 which. is provided with a non-circular aperture 23 which permits the Washer to pass over the non-circular section 19 of the bushing. The Washer is secured to the dial by passing it over the end of the bushing and then rotating it through 90.

As shown in Fig.,8, the apertured dial member 24 comprises ay metal stamping against the rear face of which the indicating sheet 25 is postioned by the spring Washf,

er26. The Washer and the knob 27v arc provided with a bayonet slot construction similar` to that illustrated in Figs. 5-7. The knob 27 is provided With a set screw 28 for securing the same to the shaft S.

'In each of the embodiments describedthe peripheral edge of the dial member carries a rearwardly extending flange which provides a recess Within Which the indicating sheet and associated parts are located.

It will be `apparent that the invention is not limited to dials for use kwith radio instruments, and that. it is not limited to the particular embodiments herein illustrated and described. Many changes Which may be made in the various parts, their relative size, shape and location fall Within the scope of my invenion as set forth in the' following claims.

1 claim:

1. In a device for rotating a shaft and indicating the angular adjustment thereof, a

dial member for cooperation'vvith a tixediducial mark, said member having circumferentially arranged sight openings thereconnecting .said dial `said sheet in alinement recense sheet to said member with portions thereof extending vacross said apertures, and means for securing said dial member to a shaft.

3. A dial comprising a dial member having circumferentially arranged apertures therethrough and having a peripheral iiange dening a recess at the rear of said member, an indicating sheet, means for removably securing said sheet in said recess with portions thereof extending across said apertures, and means for attaching said dial to a shaft.

4. An indicating device for use with a shaft having angularly spaced operating positions, said device comprising a dial having circumferentially arranged apertures therethrough, the angular spacing of adjacent openings corresponding to the angular spac` lng of the respective operating positions of the shaft, a vsheet removably secured to said dial and adapted to display -indications through` the several apertures, and means for to the shaft.

5. A device for rotating a shaft and for indicating the angular adjustment thereof, said device comprising an opaque dial adapted to be secured to the shaft, a plurality of circumferentially disposed sight openlngs through said dial, an indicating sheet having legends visible through said sight openings, and means removably securing said sheet to said dial.

6. A combined knob anddial comprising an apertured dial, a legend-bearing sheet, cooperating means on said dial and sheet for positioning the legend-bearing portions of with the apertures of the dial, and means for securing said sheet to said dial.

7. An indicating device comprisin an apertured dial, a sheet having legend-earing portions thereof in alinement with the apertures of said dial, means preventin relative angular movement of said sheet and ldial and means including a fiexible member for holding said sheet against the rear face of the dial. p

8. The invention as claimed in claim 7, wherein said means comprises a sprinoa plate having a bayonet slot connection with said dial.

9. An indicating dial comprising a bushing adapted to be secured to a shaft, a dial member carried by said bushing and having sight openings therethrough, a le end-bearing sheet at the rear face of said ial memlber, and means carried by said bushing for ripheral ange,.a1egendbearing sheet seated holding said sheet against angular movement against the rear face of said member, and

, with respect to said dial member. means preventing relative angular move- 10 `10. An indicating device comprising a ment of said sheet and member. 5 bushing for attachment to a shaft, an aper- In testimony whereof, I aiix my signature.

tured member carried by said bushing, said v member having a rearwardly directed pe-v EDWARD F. WESTON. 

